package com.neo.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    /**
     * 正常
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池" + Thread.currentThread().getName() + " -- paymentInfo_OK , id: " + id + " >>>>>> 没问题";
    }


    /**
     * 异常
     * 超时或者异常都由 paymentInfo_TimeoutHandler 进行兜底
     *
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeoutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")
    })
    public String paymentInfo_Timeout(Integer id) {
        // 异常测试
        // int num = 10 / 0;
        int useTime = 5;
        try {
            TimeUnit.SECONDS.sleep(useTime);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "线程池" + Thread.currentThread().getName() + " -- paymentInfo_Timeout , id: " + id + " >>>>>> 耗时：" + useTime + "s";
    }

    public String paymentInfo_TimeoutHandler(Integer id) {
        return "线程池" + Thread.currentThread().getName() + " -- paymentInfo_TimeoutHandler , id: " + id + " >>>>>> 【系统繁忙】";
    }

    // ========================== 服务熔断 ==========================
    @HystrixCommand(
            fallbackMethod = "paymentCircuitBreaker_fallback",
            // commandProperties 详细配置可参考：com.netflix.hystrix.HystrixCommandProperties.HystrixCommandProperties(com.netflix.hystrix.HystrixCommandKey, com.netflix.hystrix.HystrixCommandProperties.Setter, java.lang.String)
            commandProperties = {
                    @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),// 是否开启断路器
                    @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),// 请求次数
                    @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),// 时间窗口期
                    @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60")// 失败率达到多少熔断
            }
    )
    public String paymentCircuitBreaker(Integer id) {
        if (id < 0) {
            throw new RuntimeException("id 不能为负数");
        }

        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + ",调用成功，流水号:" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(Integer id) {
        return "id 不能为负数，请调整后再试,id:" + id;
    }

}
